CVE-2026-93781

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Do not block on tag allocation in scsi_eh_lock_door() scsi_eh_lock_door() is called from scsi_restart_operations() while the host is still in the SHOST_RECOVERY state, i.e. before the host is switched back to SHOST_RUNNING and scsi_run_host_queues() restarts the queues. It allocates a request via scsi_alloc_request() with no flags, so blk_mq_get_tag() may block waiting for a free sched tag when all tags are already in use. Those tags can be held by commands that were just requeued by scsi_eh_flush_done_q() during error handling. Such commands cannot be dispatched until the host leaves SHOST_RECOVERY and scsi_run_host_queues() is called - which only happens *after* scsi_eh_lock_door() returns. This forms a circular dependency: - scsi_eh_lock_door(), running in the SCSI error handler thread, waits for a sched tag held by a requeued command; - the requeued command cannot complete and release its sched tag until the error handler thread leaves scsi_restart_operations() and restart the queues. For devices with a single driver tag (e.g. USB storage) it is a guaranteed deadlock and I/O that can never be submitted. This problem has also been reproduced in our environment. Locking the door is a best-effort operation, and scsi_eh_lock_door() already returns silently when the request allocation fails. Pass BLK_MQ_REQ_NOWAIT to scsi_alloc_request() so the allocation fails instead of blocking when no tag is available. This breaks the circular dependency and allows the error handler to finish restarting the queues, after which the pending commands are dispatched normally.

• https://git.kernel.org/stable/c/261c80a6b23e34ba98bcf3f75317e35ecf0a08f0
• https://git.kernel.org/stable/c/732cb6bb37fd26863d5786522fb1997e7f5865b4
• https://git.kernel.org/stable/c/dc9e1b6b9080dd6374cc9a38e4b53abca63c3b1b

Published

Sep 24, 2026

Last Modified

Sep 25, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-9377A vulnerability was identified in SourceCodester SUP Online …2.4
• CVE-2026-93772Subscriber Cross Site Scripting (XSS) in wpForo Forum <= 3.1…6.5
• CVE-2026-93773Contributor SQL Injection in Mollie Forms <= 2.11.0 versions…8.5
• CVE-2026-93774Unauthenticated Cross Site Scripting (XSS) in WP Photo Album…7.1
• CVE-2026-93778The WP Yelp Review Slider plugin for WordPress is vulnerable…7.2
• CVE-2026-9378A security flaw has been discovered in Edimax BR-6675nD 1.12…6.3
• CVE-2026-93782In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-93783In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93784In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93785In the Linux kernel, the following vulnerability has been re…
• CVE-2026-93786In the Linux kernel, the following vulnerability has been re…8.1
• CVE-2026-93787In the Linux kernel, the following vulnerability has been re…8.1